微波辅助草酸盐沉淀法制备四方相钛酸钡纳米粉体  

Preparation of Tetragonal Barium Titanate Nanopowders by Oxalate Co-precipitation Assisted with Microwave Method

作　　者：陈杰[1] 张晴[1] 车明超[2] 

机构地区：[1]西安科技大学材料科学与工程学院,西安710054 [2]华兴航空机轮公司,兴平713106

出　　处：《人工晶体学报》2017年第8期1545-1551,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51072162);陕西省教育厅科研计划项目(12JK0785)

摘　　要：以钛酸四丁酯和硝酸钡为主要原料,采用微波辅助草酸盐沉淀法制备了纯度高、结晶度较好的四方相钛酸钡纳米粉体。分别采用X射线衍射分析(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对钛酸钡纳米粉体的结构、粒径及形貌进行表征。结果表明,在钡/钛摩尔比为1,微波温度80℃、微波时间30 min,煅烧温度700℃,煅烧时间1 h,通过添加表面活性剂OP-10,制备出粒径在50 nm左右且四方度为1.0069的钛酸钡纳米粉体,其中微波合成温度及合成时间对钛酸钡纳米粉体的四方度的影响较大。The high purity and good crystallinity tetragonal barium titanate（ BT） nanopowders were prepared by oxalate co-precipitation assisted by microwave method using tetrabutyl titanate and barium nitrate as the main raw materials. The structure, diameter and profile of the nanopowders were characterized by X-ray diffraction（ XRD）,scanning electron microscopy（ SEM） and transmission electron microscopy（ TEM）. The results show that under the condition that the mole ratio of barium and titanium is 1,the microwave reaction is at 80 ℃ for 30 min,the calcination reaction is at 700 ℃ for 1 h and with the addition of surface active agent（ OP-10）,barium titanate（ BT） nanopowders with a diameter of about 50 nm and c/a ratio of 1. 0069 can be prepared. The microwave temperature and microwave time can affect the tetragonality of barium titanate nanopowders significantly.

关 键 词：四方相钛酸钡 草酸盐沉淀法 纳米粉体 微波 

分 类 号：TM282[一般工业技术—材料科学与工程]